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Can somebody tell me how do you find variance in a 2x2 contingency table. Or give an example, I'm finding it hard to.

Anyone know the raw scores from last year's division C national test? I'm taking it tomorrow and I'm curious to see where my current partner and I would've placed.

Nerd_Bunny wrote:Anyone know the raw scores from last year's division C national test? I'm taking it tomorrow and I'm curious to see where my current partner and I would've placed.

Well, you guys got 59th in Disease last year. But I don't know the raw scores. I would suggest going over the test and seeing if you don't know anything.

Killboe wrote:

Nerd_Bunny wrote:Anyone know the raw scores from last year's division C national test? I'm taking it tomorrow and I'm curious to see where my current partner and I would've placed.

Well, you guys got 59th in Disease last year. But I don't know the raw scores. I would suggest going over the test and seeing if you don't know anything.

Actually, Killboe, Nerd_Bunny was on our Division B team last year (and was partners with me ), where we got 16th. I believe one kid on our high school team was doing it alone, and from what he told me, he didn't have time to complete the test.

You can find the raw scores for all National events by purchasing the Division C test packets on soinc.org.

Tailsfan101 wrote:

Killboe wrote:

Nerd_Bunny wrote:Anyone know the raw scores from last year's division C national test? I'm taking it tomorrow and I'm curious to see where my current partner and I would've placed.

Well, you guys got 59th in Disease last year. But I don't know the raw scores. I would suggest going over the test and seeing if you don't know anything.

Actually, Killboe, Nerd_Bunny was on our Division B team last year (and was partners with me ), where we got 16th. I believe one kid on our high school team was doing it alone, and from what he told me, he didn't have time to complete the test.

You can find the raw scores for all National events by purchasing the Division C test packets on soinc.org.

Oh ok my bad

Now that I'm going to C div, how different is B from C?

Actually, I had the same question as well, though from what I've heard, it's mainly the statistical calculations that are different. According to the current rules, for Division C "May include recognizing and accounting for potential sources of error, direct and indirect rate adjustment, stratified analysis (e.g., Mantel-Haenszel test) and use of statistical methods to describe data and test hypothesis involving qualitative and quantitative data." (3. e. ii.). This seems to be the only difference between the Division B and C rule sheets.

Also, some of my friends in Division C have told me that there is an even stronger focus on the case study portion than in Division B.

And of course, obviously the tests are harder in general.

Hope that helps! Feel free to add more, as I myself am going to Division C next year and would love more info.

As someone from Division B who's entering Division C, what are some major differences, or things that I need to know for Div. C that wouldn't be found in Div. B? I know that there's some statistics involved, but anything specific would be greatly appreciated.

acidbeaker wrote:As someone from Division B who's entering Division C, what are some major differences, or things that I need to know for Div. C that wouldn't be found in Div. B? I know that there's some statistics involved, but anything specific would be greatly appreciated.

See the post above you Also some specifics to study are chi-squared tests, Fischer's exact test, double blind studies, biases, p-values, confidence intervals, null/alternative hypotheses, etc.

Where can I find information on what to study for next years topic (which will most likely be environmental quality)?